smedal



G SMEDAL TYPEIWRITER ATTACHMENT. APPLICATIOM FILED NOV. 6. 1915.

Patented Aug. 29, 1916.

2 $HEETSSHEET 2.

w w m 4 G SMEDAL @ZTNT OFFICE.

Paimnhrd Aug 29. 1916.

Application 11126 Novamber 5, 191K:

l Ulishnuim.

Vim nhjccts in View 9 novel QfH/UYGS and snimnge iffiw "nunmu merits or! the (:lmmcier s an my prior patent in Pratent Nu .LMQQIQQ fi awed 1U 191.5. an)

above wfwreai $0., 10.

My patmted im'ez'atimx mnprehendg moans for aupgmting :1 phrmllty of paper r033? am? a a: rlsun 1'01! with rsspect to the marriage of a i pu riwr for m wvnient thaz'ewlth, whm'Qby dup'iimte copies may be mum. 1n p mtcza. I have shun-is Hi- Ming benmth Eu: pintvn and (he ai mn in "width flu mubun r-fmsei has new wiliulrzw'n bvnmath {he 311mm after rewind 3. is, 011- V Diff/Hind attaahmf-nt. ha mar m? M SEYLK flu erig'inal an iiu nmw Sheds fmm the paper mus witimm 215w of 31m invention farming U19 of the psua nt appiimtiom m difficuhy and supply a f'nflflchumus whereby Hm comwnlvn' abiliky of 11m utmchrmm m materiaily 's'ncrmueeii.

and

mu? H1 the case by a pin 13. The other end of this spiral spring is provided with an opening for engagement over a hu ll projecting radiall from a sleeve 14 on the roller shaft 9 which extends through the case 10. The wall of the case 10 \Yllitll is opposed to the roller supporting bracket, provided with a circular SQI'lQS of openings 15 whit-h a re ar ranged in :spared relation. To the roller bracket 7. one end of a resilient llltt'll plate l6 is fixed. This plate has an intermediate curved section in \ihich spaced. latrrall v projecting studs 17 are limit. and these studs are adapted to projert through adja cent opening. 15 in the wall f the ease it). thereby holding aid case against rotary movement upon the shaft of the roller h. i he other or free end of the latch plate 1 projects forwardly beyond the edge oi the case 10 that it may be conveniently Ina nipulated. 1S designates a face plate to cover the outer open side of tinspring c: v 10, said plate being formed with a central. outu'ari'llj' projecting hub or extension ll) having a. peripherally milled head :20. This head has a reetan 'ular longitudinal openin or bore therein which coincides with a rylindrical bore in the hub extension and bod of the face plate to and aid rectauguia bore or opening is adapted to rereivc the squarii or rectangular extremity of the roller shalt indicated at 21. The end of the shaft bored and threaded to recit the shank of a retaining serei' 32, Wherely the fare. plate 18 is Secured upon the open side of the spring case 10. The plate 18 has a epiral groove 23 tonne in its outer face. one end of said groove terminating adjaernt to the periphery of the face plate and the other end thereof eontigjuous to the ri-utral hut: extension on the plate. A hie" oi .shou der 24 is formed on the fare of said plate in close pl'oxin'iity to the outer t rtuiua o said groove. A stop finger 3. has a laterall projecting pin it; fixed n our end thew-oi \vhirh is mounted to r tat in lltll't' l ears 27 projecting: from the periphery oi the case 10. This ting 'er has a aterally pro jecting spur or lug 28 formed thereon adjacent its free end. said lug being adapted For engagement in the spiral groore 32% pro\ ided in the face of the. plate 1?.

Attention is now ('liiected to F Z of the drawings. Win-rein l have shoe-,1 the attach ment in eonniiirtion with th platen of a typt'iirriter. The platen r ted at l equig'iped with the eal no h t lil i'lmfllr whereby a stcplrr-" lep IUiillf more! 1-. imparted to the same in the operation i" the machine.

In the operati n of tachment, the paper from the upper and lower paper rolls and also the earbon strip or sheet from the roll 8. is drawn donln wardly and engaged beneath the platen in my inanil'olding atthe usual manner. said platen being rotated until the sheets are disposed in the desired position. The typewriter is now operated in the usual manner and. as: the writing proreeds, the oi iginal ropy. the intermediate t'flllitlli sheet and the duplicate rop ar moved together in such turning nnneinent of the platen. Now it is oin'ions that. as the carbon sheet is thus pulled from the roller, the tension ol the spring 1; gradually in rreased. When it is desired to cut olt' oi sever the original and dupliedicopies the pressure upon the pri er and rarbon sheets is released, and the 5 ring innnediatelv acts to rewind the earhon (sheet up the roller a. \ll'2l\'\ll1, said sheet uprrardl} be tween the two paper sheets until the free end edge of said carbon sheet disposed approximately immediately beneath the platen. In this rrn'iinlinf. of the i-arbon sheet, it will be understood, from ref'errn to Figs. 1 and 2 of the drawings. ill sprung case. l0 its held stationary ain said linger gradually moves outux-erdl 1o Ward the periphery of the piat as me latter rotates. until tlu shoulder fit on plate engages against the tag 31 or th ;-=to'- linger, thu stopping: the lj'urtlwr v oF the sprint 12. and the rewiudin; pi" ila' ca rbon sheet. l i' thus limit ng the no of the val-hon sheet. under the :u-tioi sl'n'ing. be proper disposal of tier beneath the platen is assured so that t i not be neeessary to manually manipulat r adjust said sheet beneath the platen i subsequent operation of th iiiftililtih .i v arbon sheet is again unuonnd from the re r. the tree end of stop linger will pure innardly from the outer edge ot th plai'r 1 toward it; center. as will be readily under stood. When it is neressarv to tear oll' t n part of the carbon sheet which has be n completely used up. in order that the sprung will not be so tightly wound when the rar bon is withdrawn from the roll as to pr clude the continued unwinding of the can l on sheet in the next op ration of the ma chine. l have provided the mean for le creasing the tension of the spring 5. means consists in the resilient latch at 163. ll ftllt'lllfl' the free end of tl'is plate inwardly, the studs 15 tlurrou nu he a ith drawn from the openings in th s wall t' the ease 10 so that said care may turn upon the end of the roll r shaft. i hue. utter the used Section of the rarbon sheet torn oti' and the sheet again pulled downwardly and disposed beneath th platen, the spring will be properlv tensioned in the operation l the machine so that hen the platen is released, the carbon will be rcnound on the i iiii the? roller for the desired distance to insure the proper disposal of the end of the sheet with respect to the platen. I

If desired, a relatively stationary knife or cutting means for the paper sheets, such as that disclosed in my prior patent, may be provided.

Figs. 6 and 7 of the drawings, I have illustrated a slightly modified form of the invention. wherein the carbon roller, indicated at 8, is in the form of the ordinary shade roller, having a fixed trunnion on one end and a non-rotataliile rod or shaft 9 in its other end. One end of the Winding spring 30, housed within the roller, is connected to this red. In this modified construction, one end of the roller 8 has a metal sleeve 31 fitted and suitably fixed thereon, and a relatively large circular metal disk 32 is formed upon one end of said sleeve. The sleeve 31 is provided upon its periphery with a spiral groove 33 terminating at its ends in the stop shoulders 34. The outer face of the disk 32 is provided with a similar spiral groove 35 at the opposite ends of which the shoulders 36 are formed. Upon one of "the roller supporting brackets T, a stop finger or arm :7 is pivoted at one of its ends, as at 38, the other end of said finger being angularly disposed and engaged in the spiral groove 35 of the disk 315. i. pin 39 is also rotatably mounted in the bracket 7 and, upon one end thereof, a coil spring 40 is disposed, one terminal of the spring being fixed to said pin and the other terminal thereof being engaged with the edge of the roller bracket 7. Upon the other or inwardly projecting portion of this pin 39, a finger 41 is pivoted, the free end of said finger being engaged in the spiral groove 34. on the periphery of the sleeve 3:2. The spring 40 yieldingly holds the vtree end of the finger il in the spiral groove, as will be rcadi ly understood. Thus, it will be seen that there is double provision against the entire rewinding or" the carbon sheet upon the roller and if one oi? the stop lingers should accidentally become disengaged from the spiral groove, the other of said fingers will remain as an etiective limiting stop to the rotation of the roller. However, it is manifest that, if desired, either one of these stop devices may be dispensed with, and only a single stop employed.

From the foregoing description, taken in mnnection with the accompanying drawings, it will be appreciated that I have devised a very essential and desirable adjunct to my patented invention. B y the provision thereof; the operator may readily tear or out of? the typewritten shee s from the paper rolls without in any way mutilating or tearing the carbon sheet, as said sheet is withdrawn and rewoundv upon the carbon roller immediately upon the release of the paper.

The soiling of the hands in the manual manipulation of the carbon sheet is also avoided, as the limiting or stop means for the carbon roller will positively operate to prevent the entire withdrawal of the carbon sheet from beneath the platen so that it is only necessary for the operator to re-position the two paper sheets on the opposite sides of the carbon sheet and under the platen when the operation of the machine may be continued. The addition of this automatic rewinding device for the carbon or other duplicating sheet does not greatly complicate the construction of the original invention as shown in my prior patent, or materially add to the manufacturing cost thereof. It is also possible, in view of the mounting and arrangement of the several parts, to utilize a plurality of interchange able spring casings and different sizes of spiral springs so that the carbon sheet may be withdrawn to a greater or less extent, as desired, in accordance with the length of the written sheets, before the spring is completely unwound and the stop device comes into operation. Thus, the invention is capable of adaptation at relatively small expense for use in connection with the manifolding attachment when employed in the preparation of way bills, credit or account statements. and the like.

While I have above disclosed what I believe to be the present preferred embodiments of the device, it is to be understood that the same is susceptible of considerable modification therein and I, therefore, reserve the privilege of adopting all such legitimate changes as may be fairly embodied within the spirit and scope of the invention as claimed.

Having thus tion, what I desire Letters Patent is l. The combination with the platen of a typewriting machine, of paper and carbon rollers supported contiguous to the platen whereby the paper and carbon sheets may be engaged under the platen, means automatically operating upon the release of the paper to reverse the rotation of the carbon roller and rewind the carbon sheet thereon, a movable stop element, means fixed on the roller shaft co-acting with the stop element to actuate the same, said means carrying a stop"shoulder, said element being shifted into-the path of movement of said shoulder in the rewinding of the carbon sheet to stop the reverse rotation of the roller, whereby the position of the free end of the carbon sheet with respect to the platen may be predetermined.

2. The combination with the platen of a typewriting machine, of paper and carbon rollers supported contiguous to the platen whereby the paper and carbon sheets mav fully described my inven to claim and secure by be engaged under the platen, means automatically operating upon the release of the paper to reverse the rotation of the carbon roller and rewind the carbon sheet thereon, a

movable stop element, a disk fixed on the roller shaft and provided with a shoulder, said disk being further provided with means engaged by the stop element whereby said element is shifted into the path of movement of the shoulder to stop the rewinding of the carbon sheet.

The combination with the platen of a typewriting machine, of paper and carbon rollers supported contiguous to the platen whereby the paper and carbon sheets may be engaged under the platen, means automatically operating upon the release of the paper to reverse the rotation of the carbon roller and rewind the carbon sheet thereon, a m vable stop element, a disk fixed on the rollershaft and provided with a shoulder, said disk being provided with a spiral groove co-acting with said stop element and having means at the end of said groove for engagement with said element to limit the rewindlng of the carbon sheet.

4. The combination with the platen of a typewriting machine, of paper and carbon rollers supported contigubus to the platen whereby the paper and carbon sheets may be engaged under th platen, means automatically operating upon the release of the paper to reverse the rotation of the carbon roller and rewind the carbon sheet thereon, a pivoted stop finger provided with a lug, and a disk fixed upon the roller shaft having a spiral groove in its face in which said lug is engaged, whereby the finger is shifted in the rotation of the carbon roller, said disk being also provided with a shoulder in the path of movement of which said lug is disposed in the rewinding of the carbon sheet.

5. The combination with the platen of a typewriting machine, of paper and carbon rollers supported contiguous to said platen for the engagement of the paper and carbon sheets'therewith, a spring case loosely mounted upon the shaft of the carbon roller and open upon one side, a cover plate "for the open sid of said case fixed upon the re r shaft, a spring within said case to rewind the carbon sheet upon the roller, a fixed resilientdatch memberhaving means for adjustable engagement with the loosely mounted case, whereby said case is held against rotation with respect to the roller shaft, and means cotiperating with means on the cover plate for the open side of said case to limit the rewinding of the carbon sheet upon said roller under the action of said spring.

6. The combination with a roller and a paper sheet Wound thereon, of a spring connected to said roller and placed under tension when the paper sheet is drawn there from to rewind the sheet upon said roller when the sheet is released, a disk fixed upon th roller shaft and having a spiral groove in its face 51nd a shoulder at the outer terminal of said groove, and a movable element operating in said groove and automatically shifted in the rewinding rotation of the roller into the path of movement of said shoulder to positively limit the rewinding of the paper sheet.

In testimony whereof I hereunto affix my signature in the presence of two Witnesses.

' GREGGAR SMEDAL.

Witnesses JAMES THoMrsoN, CARRIE JOHNSTON. 

